console.log("isNaN {}", isNaN({}));
console.log("isNaN 'Hello'", isNaN("hello"));
console.log("isNaN '123'", isNaN("123"));
console.log("isNaN undefined", isNaN(undefined));
console.log("isNaN 'NaN'", isNaN("NaN"));
console.log("isNaN NaN", isNaN(NaN));
